Shut In

Shut In

Definition(s)

Shut In

"Shut in" means to close a well's surface, wellhead, or subsurface valves to halt flow from or into the well, with the completion interval remaining open to the tubing below the closed valves. Source: Alaska Oil and Gas Conservation Commission, Definitions, Alaska Admin. Code tit. 20, § 25.990, December 7, 2012. Regulations  

Shut In

“Shut-in” means the status of a production well or an injection well that is temporarily closed down, whether by closing a valve or disconnection or other physical means. Source: Oil and Gas, New Mexico Administrative Code Title 19, Chapter 15, January 2013. Regulations  
Shut-In Pressure

Shut-In Pressure

Definition(s)

Shut-In Pressure

"Shut-in pressure" means the pressure noted at the wellhead when the well is completely shut in, not to be confused with bottom hole pressure. Source: Oil and gas Conservation, North Dakota Administrative Code, Chapter 43-02-03, April 2012. Regulations  

Shut-In Pressure

“Shut-in pressure” means the gauge pressure noted at the wellhead when the well is completely shut-in, not to be confused with bottom hole pressure. Source: Oil and Gas, New Mexico Administrative Code Title 19, Chapter 15, January 2013. Regulations  
Shut-in Well

Shut-in Well

Definition(s)

Shut-In Well

Well with one or more valve(s) closed on the flow path. Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards

Shut-In Well

An inactive well should be classified as shut-in when the completion interval is open to the tubing or to the casing. A shut-in well may have tubing and packer, which isolates the interior of the casing above the packer from the completion interval. A well may also be shut-in without a packer which exposes the interior of the casing to any fluids from the completion interval. Shut-in wells may have been removed from active service in anticipation of workover, temporary abandonment, or plugging and abandonment operations. Generally, the wellbore condition is such that its utility may be restored by opening valves or by energizing equipment involved in operating the well. Shut-in status should begin three months after production, injection, disposal, or workover operations cease. Source: API BULLETIN E3, Environmental Guidance Document: Well Abandonment and Inactive Well Practices for U.S. Exploration and Production Operations, First Edition, January 1993 (Reaffirmed June 2000). Global Standards  

Shut-In

Inactive wells in which the completion interval is open to the tubing and to the casing, or is open to the tubing only. The well may be shut-in without packer and with or without tubing, in which case the interior of the casing is not isolated from the completion interval. Or, the shut-in well may have tubing and packer, which isolates the interior of the casing above the packer from the completion interval. Shut-in wells have been removed from active service in anticipation of a workover, temporary abandonment, or plugging and abandonment operations. Generally, the wellbore condition is such that its utility may be restored by opening valves or by energizing equipment involved in operating the well. Shut-in status should begin 90 days after production, injection, disposal or workover operations cease. Source: API BULLETIN E3, Environmental Guidance Document: Well Abandonment and Inactive Well Practices for U.S. Exploration and Production Operations, First Edition, January 1993 (Reaffirmed June 2000). Global Standards  

Shut-In Well

SHUT-IN WELL shall mean a well which is capable of production or injection by opening valves, activating existing equipment or supplying a power source. Source: Oil and Gas Conservation Commission, Practice and Procedure, Code of Colorado Regulations, 2 CCR 404-1, February 2013. Regulations
Shut-off Head

Shut-off Head

Definition(s)

Shut-off Head

Head delivered by the pump at zero flow. Source: IADC UBO / MPD Glossary, December 2011. Global Standards
Shutdown

Shutdown

Definition(s)

Shutdown

Shutdown of machinery refers to the situation when the machinery is shut down from normal operating condition to full stop. Two types of shutdown exist: trip and shutdown. Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. Global Standards  
Shutdown Valves, Emergency

Shutdown Valves, Emergency

Definition(s)

Shutdown Valves, Emergency

Used to shut down flow line from rotating head in emergency situations, preferably butterfly or similar quick - closing design See ESD. Source: IADC UBO / MPD Glossary, December 2011. Global Standards
Shuttle Valve

Shuttle Valve

Definition(s)

Shuttle Valve

A checking type valve that shifts between two or more inlets allowing the movement of control fluid to and from multiple sources. Source: API STD 53, Blowout Prevention Equipment Systems for Drilling Wells, Upstream Segment, Fourth Edition, November 2012. Global Standards  

Shuttle Valve

A valve with two or more supply ports and only one outlet port. Note: When fluid is flowing through one of the supply ports the internal shuttle seals off the other inlet port(s) and allows flow to the outlet port only. Source: API SPEC 16D, Specification for Control Systems for Drilling Well Control Equipment and Control Systems for Diverter Equipment, Upstream Segment, Second Edition, July 2004. Global Standards
SI

SI

Definition(s)

SI

International System of Units. Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standards

SI

International System. Source: API RP 14G, Recommended Practice for Fire Prevention and Control on Fixed Open-type Offshore Production Platforms: Upstream Segment, Fourth Edition, April 2007. Global Standards  

SI

Système International d'Unités. Source: NORSOK D-001, Drilling facilities, Rev. 3, December 2012. Global Standards  

SI

Site investigation. Source: ABS Guidance Notes on Geotechnical Performance of Spudcan Foundations, January 2017. Global Standards
SIA

SIA

Definition(s)

SIA

Safety Instrumentation and Alarms. Source: OGP Report No. 456, Process Safety – Recommended Practice on Key Performance Indicators, International Association of Oil & Gas Producers, November 2011. Global Standards  
Sick Bay

Sick Bay

Definition(s)

Sick Bay

Though defined in regulation 2 as ‘a room’, sick bays should, if possible, have separate areas for patients to rest and recuperate. Source: Health Care and First Aid on Offshore Installations and Pipeline Works, Offshore Installations and Pipeline Works (First-Aid) Regulations 1989, Approved Code of Practice and Guidance (UK HSE L123), Second Edition, 2000. Regulatory Guidance  

Sick Bay

“Sick bay” means a room for the medical treatment and care of sick and injured persons. Source: The Offshore Installations and Pipeline Works (First-Aid) Regulations 1989, UK S.I. 1989/1671, 1989. Regulations  
SICP

SICP

Definition(s)

SICP

Shut-in Casing Pressure. Source: Deepwater Well Control Guidelines. IADC Guidelines Source: IADC UBO / MPD Glossary, December 2011. Global Standards
SID

SID

Definition(s)

SID

Seabed Isolation Device. Source: Deepwater Well Control Guidelines. IADC Guidelines
Sidetrack Operation

Sidetrack Operation

Definition(s)

Sidetrack Operation

"Sidetrack operation" means a drilling operation conducted for the purpose of straightening the original hole, bypassing junk, or correcting mechanical difficulties in the original hole. Source: Alaska Oil and Gas Conservation Commission, Definitions, Alaska Admin. Code tit. 20, § 25.990, December 7, 2012. Regulations  
Sidewall Sample Taker

Sidewall Sample Taker

Definition(s)

Should

A ballistic or mechanical tool used to extract and retrieve formation core samples from the sidewall of the wellbore. Source: API RP 67, Recommended Practice for Oilfield Explosives Safety, Upstream Segment, Second Edition, May 2007. Global Standards  
SIDPP

SIDPP

Definition(s)

SIDPP

Shut-in drill pipe pressure. Source: Deepwater Well Control Guidelines. IADC Guidelines
SIEM

SIEM

Definition(s)

SIEM

Security information and event management. Source:  DNVGL-RP-G108, Cyber security in the oil and gas industry based on IEC 62443, DNV GL, September 2017. Global Standards
Sieve

Sieve

Definition(s)

Sieve

Laboratory screen with wire-mesh or electronically-punched holes of known dimensions. Source: API RP 13C, Recommended Practice on Drilling Fluids Processing Systems Evaluation, Upstream Segment, Fourth Edition, December 2010. Global Standards
Sieve Analysis

Sieve Analysis

Definition(s)

Sieve Analysis

Classification by mass of solid particles passing through or retained on a sequence of screens with decreasing aperture sizes. NOTE Sieve analysis can be carried out by wet or dry methods. Source: API RP 13C, Recommended Practice on Drilling Fluids Processing Systems Evaluation, Upstream Segment, Fourth Edition, December 2010. Global Standards
SIF

SIF

Definition(s)

SIF

Stress Intensification Factor. Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards

SIF

Ratio of the actual or effective longitudinal stress in a component or fitting under external load to the nominal stress in that component or fitting as determined based on a straight pipe run with the same MPRxx as the component fitting. Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
Sight Windows

Sight Windows

Definition(s)

Sight Windows

Sight windows are an effective and economical way of viewing tank, pressure vessel and piping systems interiors. Also referred to as a sight glass. Source: IADC UBO / MPD Glossary, December 2011. Global Standards
Sighting Survey

Sighting Survey

Definition(s)

Sighting Survey

A survey to confirm that the relevant construction or the equipment is in a satisfactory condition and, as far as can be judged, will remain so until the postponed survey has been carried out Source: Rules for Classification – Offshore units, DNVGL-OU-0101, Offshore drilling and support units, DNV GL, July 2015. Global Standards
Signal

Signal

Definition(s)

Signal

Response of electronic NDT equipment to an imperfection or defect. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  

Signal

Audible indication giving information about the condition of a system or equipment. Source: IMO resolution A.1021(26), Code on Alarms and Indicators, 2009, 18 January 2010, International Maritime Organization. Regulatory Guidance
Signal on Power

Signal on Power

Definition(s)

Signal on power

Separate electrical cables may also be required for transmission of control signals/data in an electrohydraulic PCS. Alternatively, the control signals/data may be superimposed on the power output, commonly referred to as “signal on power”. Source: API RP 17A, Design and Operation of Subsea Production Systems—General Requirements and Recommendations, Fourth Edition, Reaffirmed 2011. Global Standards  
Signal Time

Signal Time

Definition(s)

Signal Time

Period of time elapsed between the remote initiation of a control command and the initiation of a control function operation subsea (the commencement of the shift time). Source: API SPEC 17F, Specification for Subsea Production Control Systems, Second Edition, December 2006 (Reaffirmed April 2011). Global Standards
Signal-to-Noise Ratio

Signal-to-Noise Ratio

Definition(s)

Signal-to-Noise Ratio

Ratio of the signal from a significant imperfection or defect to signals generated from surface noise. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards
Signaler

Signaler

Definition(s)

Signaler

“Signaler” means a person instructed by an employer to direct, by means of visual or auditory signals, the safe movement and operation of materials handling equipment. Source:  Nova Scotia Offshore Petroleum Occupational Health & Safety Requirements, Canada-Nova Scotia Offshore Petroleum Board, Canada, December 2000. Regulations
Signaller

Signaller

Definition(s)

Signaller

“Signaller” means a person instructed by an employer to direct, by means of visual or auditory signals, the safe movement and operation of materials handling equipment; signaleur. Source: Oil and Gas Occupational Safety and Health Regulations, SOR/87-612, Canada, current to April 29, 2013. Regulations
Signature

Signature

Definition(s)

Signature

A recognizable, distinguishing pattern. Extended Definition: Types of signatures: attack signature, digital signature, electronic signature. From: CNSSI 4009; Adapted from: NIST SP 800-94. Source: NICCS™ Portal Cybersecurity Lexicon, National Initiative for Cybersecurity Careers and Studies (https://niccs.us-cert.gov/glossary) as of 11 November 2015, Global Standards
Significant Archaeological Resource

Significant Archaeological Resource

Definition(s)

Significant archaeological resource:

Significant archaeological resource means those archaeological resources that meet the criteria of significance for eligibility to the National Register of Historic Places as defined in 36 CFR 60.4, or its successor. Source: Oil and Gas and Sulphur Operations in the Outer Continental Shelf, 30 CFR 250 (2013). Regulations  
Significant Change

Significant Change

Definition(s)

Significant change

A significant change is likely to be one that changes the basis on which the safety case was accepted. In relation to a safety management system, "significant change" means a change to the whole of, or a major part of, the safety management system that would warrant a change to the description of the SMS in the safety case. Source: NOPSEMA Guidance note: Safety Case Lifecycle Management, N04300-GN0087, Australia, Revision 5, December 2012. Regulatory Guidance